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Laser-diode-pumped thin-slice c-cut Nd:GdVO(4) multimode laser with coherent vector fields.

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

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Published on: April 24, 2014

Area of Science:

Optics and Photonics
Solid-State Lasers
Nonlinear Dynamics

Background:

Multimode solid-state lasers often exhibit complex antiphase dynamics.
Laser-diode (LD) pumping offers efficient energy transfer for solid-state laser systems.
Coherent vector fields in lasers can arise from mode synchronization phenomena.

Purpose of the Study:

To investigate the spontaneous formation of coherent vector fields in a specific laser system.
To analyze the dynamics and characteristics of these vector fields.
To compare the observed effects with those in linearly polarized multimode lasers.

Main Methods:

Utilizing a laser-diode (LD)-pumped thin-slice c-cut Nd:GdVO(4) laser.
Operating the laser under multi-longitudinal mode oscillation conditions with reflective end faces.
Observing and analyzing the resulting optical field characteristics.

Main Results:

Spontaneous formation of coherent vector fields was observed.
Synchronization of longitudinal modes of orthogonally polarized transverse modes was identified as the cause.
Suppression of antiphase dynamics typical of multimode lasers was achieved.
An enhanced self-mixing interference effect was noted compared to linearly polarized lasers.

Conclusions:

The study demonstrates a novel mechanism for generating coherent vector fields in solid-state lasers.
This finding offers a method to control and suppress undesirable dynamics in multimode lasers.
The enhanced self-mixing interference suggests potential for improved laser sensing and metrology applications.